math problem...can you help me?

Question

a country has three newspapers A, B and C.
40% of the people read B
36% read A
52% read C
8% read A and B
11% read B and C
13% read A and C
3% read all the papers
and 19% read none
what percentage
read A?
and what percentage read both B and C?
what percentage read both A and B ?

I spend like1 hour on this and still can't do it...
I'm trying to help my brother.
but I can't.
can someone help?

Answer 1

All the answers are given above!

36% read A

11% read both B and C

8% read both A and B.

Basically they are testing your comprehension of a long statement. There is no calculation involved above. All the information is already there.

Answer 2

The venn diag for the prob is here: http://vinilm.googlepages.com/venndiag.JPG

Draw the three circles for A, B and C.
Now, my trick to answer such questions. Take the area that is common to all three and put the value there
In this case, it says, readers of all three papers are 3%.
Now, let's look at the circle A.
The total values of all the areas in the circle A should add up to 40%. That includes the area common to circle A&C, area common to A&B and the area common to A,B&C.
Since 36% read A, and 3% read A,B&C, 36-3=33% read A&B, A&C and A, but not A, B and C.
We know that 8 % read A&B, but this also includes the 3% of people who read A, B and C. So, the number of people who read A&B but not C are 8-3=5% (i)
Now, we know that 13% read A&C. That means, in those 13% readers, we also have folks from the 3% (who also additionall read B), so the number of people who read A&C but not B are 13-3=10% (ii)
Now, we tackle the larger circle A, and in this case we know 36% read A.
We know 5% read A&B (from (i)), 10% read A & C(from (ii) and 3% read A,B and C (given). So the number of people who read only A are
36-5-10-3=18%.

Following the similar line of reasoning, we get
the number of people who read B&C=8%
We already know the number of people who read A&B=5% from (i) above

Let me know if you need the Venn diagram for this. It is easier once you draw the Venn diagram, and remember that, when such problems when they 36% read A, they mean, the entire circle for A totals to 36%.

Answer 3

dude, u have the answers already look at ur problem

36% read A
11% read both B and C
8% read both A and B

dont worry, everybody misses something or another, just an honest mistake

Answer 4

Ans. 19%read none.
so 100-19=81% will read news paper.
3% will read all news papers.
3% will read A,B,C news papers.
81-3=78%will read A&Bor B&Cor A&C

Answer 5

36% read A
8% read A and B
11% read B and C

Answer 6

you answered your own question
b and c 11%
a and b 8%

Answer 7

60 % I think

Answer 8

The answer is on the question. Isn't it?